Which of the following statemenfj wl;*;cbqk,epnb j,6*:oawts about the effect of surface area and volume on the celk6b *jf;c e,bqwpw l*o aj:n;,l’s processes is false?

  Which statement best dj4kt jz* b+:pjf :ci0describes stem cells?

  Which is a correct descriptia:gu2 kxekx 55on of the cell type adapted for gas exchange in the lung5uaek : 2xgxk5s?

  Which of the following explains the limitations on cell yfzh,w au hq1h3mi :yf,;.qi1 l5hqt.size?

  What is this cell's most likely 66wkah xenql p(3 hq(as*, bm(primary function, and where could it be located inw(h 6pk*n6q( qxms3b aal,e(h a mammal?

  Which of the following characteristics of type Ii w,(5mh urrrin* xpqq*7/xe * pneumocytes contribute to increasing the rate of gas exchangere(qqp ,7*/i nrxm 5*riuhxw*?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a4y0o02bkbucdj nh ,b1 bone marrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem 4 ,ohcnyjkdb10b bu02cells has the patient received?

  Based on the Venn diagram, which+ x*sshyq9u0e identifies cardiac muscle cells and striated muscle fi +ehy9ss*q xu0bres?

Below is a diagram of a motor neuroi7m 9 t.:nyakxfoc7 8xn. Neurons are the longest cells in the human body8nf.cxkx ot y 9m:77ai.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratory d l /nj//xbitc5istress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two differc5/jbit /lx /nent alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that emb.ez1v)k/;p n h/da(aqk; irw aryonic stem cells are not used in the treatment o a)p;q/ e i;v rd1n(hz.kaawk/f leukaemia?

  The table shows the diameters of red blood cells fmeda4*9 1 knzglpm),mbx/ w0hrom different organisms. Which 0xmd 1bz*h 9eg4lmk,n a)mwp/ red blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the prox;l7 c8*m1z7/fw ilxj *exxupqimal convoluted tubule make these cells more adapted to the functions they perczjxipw elqxx;u/* 17m8lf *7form.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells an 1oysy4w36qr7yh (xjdd specialised cells is/are not tru(j1y6ywq3o4x dry s h7e?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of th)7dt p z+ *bansqm4q1te following is the correct order from smallest to largest?74 bd1t+z a)qp*nqts m

  Which row in the following table gives the correct disadvantages of the f-d.xm n2e,oy different stem cell sourced. n2y f,oxm-es for therapeutic uses?

1.Describe how the use of stem cells mayz;7k fxgf :z9ue,up6 poq0 0o;b ljr(j be used to treat type I diabetes in the futuq( 0 pr90o,z e6ujp;ogl7:fzxjbuk;f re.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells (not to scale)-o;w)di(mt9d n *l ;opunhnd,.

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.